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Related Experiment Video

Updated: Mar 11, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Published on: July 8, 2013

Programmable and reversible plasmon mode engineering.

Ankun Yang¹, Alexander J Hryn¹, Marc R Bourgeois²

¹Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208.

Proceedings of the National Academy of Sciences of the United States of America

|December 3, 2016

Summary

This summary is machine-generated.

Aluminum nanoparticle arrays in elastomers enable tunable, ultranarrow plasmon resonances in the visible spectrum. Stretching dynamically controls particle spacing, optimizing optical responses for advanced sensing and nanolasers.

Keywords:

flexible substrates lattice plasmons mode engineering nanoparticles plasmonics

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Last Updated: Mar 11, 2026

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Area of Science:

Plasmonics
Nanophotonics
Materials Science

Background:

Plasmonic nanostructures enhance optical fields and offer narrow linewidths, crucial for many applications.
Achieving actively engineered, ultranarrow resonances across the visible spectrum within a single system remains a challenge.

Purpose of the Study:

To demonstrate active engineering of ultranarrow plasmon resonances in the visible regime.
To explore the use of aluminum nanoparticle arrays in elastomers for tunable optical responses.

Main Methods:

Fabrication of aluminum nanoparticle arrays embedded in an elastomeric slab.
Utilizing mechanical stretching to tune particle spacing and optical properties.
Investigating the interplay between diffraction modes and single-particle plasmon resonances (dipolar/quadrupolar).

Main Results:

Achieved high-quality plasmon resonances with linewidths as narrow as 3 nm.
Demonstrated resonances at wavelengths inaccessible to conventional plasmonic materials.
Showcased selective access and optimization of dipolar or quadrupolar lattice modes via dynamic modulation of particle spacing.

Conclusions:

Programmable plasmon modes in stretched aluminum nanoparticle arrays offer real-time tunability.
These tunable materials are promising for plasmon-enhanced molecular sensing and plasmonic nanolasers.
Opens new avenues for integrating plasmonics with flexible electronics.